Convertible bed.



H. M. TERRY.

GONVERTIBLE BED.

APPLIGATION FILED SEPTA, 1012.

' 1,055,241. Patented Mar. 4, 1913.

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CONVERTIBLE BED.

APPLICATION FILED SEPT. 4, 1912. v 1 ,O55,241, Patented Mar. 4, 1913.

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mzwtoz HemyM Terry 5W wi lmeooao ATENT OFFICE.

HENRY M. TERRY, 0F SEATTLE, WASHINGTON.

CONVERTIBLE BED.

To all whom it may concern:

Be it known that I, Hnxnr M. Team, a citizen of the United States,residing at Seattle, in the county of King and State of lVashingt-on,have invented new and useful Improvements in Convertible Beds, of whichthe following is a specification.

The invention relates to beds, and more particularly to the class ofconvertible beds for use in hospitals, or the like.

The primary object of the invention is the provision of a bed whereinthe mattress support or frame therefor is formed in a plurality ofsections, at least two of which are hinged together, wherebvon'adjusting the same an occupant of the bed can be brought from lyingto sitting position without the necessity of bodily handling suchoccupant, thus avoiding shock to the latter when it is desired to changethe position of the patient.

Another object of the invention is the provision of a bed wherein anoccupant will be comfortable and when necessary the position of thelatter can be changed. so as to bring the patient to sitting, recliningor lying position Without requiring exertion on the part of saidpatient, or the attendant, or the necessity of bodily moving suchpatient.

A further objectof the invention is the provision of a bed which issimple in construction, strong, durable, readily and easily operated,and inexpensive in manufacture.

iVith these and other objects in view the invention consists in theconstruction, com bination and arrangement of parts as will behereinafter more fully described, illustrated in the accompanyingdrawings, and pointed out in the claims hereunto appended.

In the drawings: Figure 1 is a side elevation of a bed constructed inaccordance with the invention. Fig. 2 is a vertical longitudinalsectional view through the bed showing the same adjusted. Fig. 3 is abottom plan view of the bed. Fig. 4t is a perspective view of theoperating shaft, showing the clutches and sprocket wheels mountedthereon, and its crank handle detached. Fig. 5 is a perspective view ofone of the stud shaft brackets, the shaft and rack bar being in relativeWorking position together with the locking dog or catch.

Similar reference characters indicate corresponding parts throughout theseveral views in the drawings.

Specification of Letters Patent.

Application filed September 4, 1912.

Patented Mar. 4, 1 913.

Serial No. 718,495.

Referring to the drawings by numerals, the bed comprises a head frame 5,footframe 6, and side rails 7, the latter being detachably connected tothe head and foot frames in any ordinary wcll known manner.

I Adapted to normally rest upon the side rails of the bed is anadjustable mattress support or frame hereinafter more fully described.

The mattress support or frame comprises sections 8, f) and 10respectively, the sections 8 and 9 being connected together by means ofhinges 11, so that the section 8 can be swung at an angle with respectto the section 1) when the occasion requires. Adapted to be superimposedupon the mattress support or frame is a sectional mattress 12, thesections of which are of a size corresponding to the sections 8, 9 and10 of. the frame, so that the mattress will not interfere with theraising and lowering or the independent adjustment of the sections ofthe mattress support or frame.

Journaled transversely in the side rails 7 of the bed is an operatingshaft 13, while spaced therefrom and arranged contiguous to the headframe and journaled in the side rails 7 is a counter shaft 1.4, whichhas fixed thereto medially thereof a sprocket wheel 15 over which istrained a driven sprocket chain 16, the same being also trained over asprocket wheel 17 fixed centrally to the operating shaft 13, so that onthe rotation of the latter similar movement will be simultaneouslyimparted to the counter shaft 14;.

Formed integ ill with the side rails 7 of the bed and projectinginwardly are brackets 18, in which are journaled rotatable stud shafts19, to which are fixed sprocket wheels 20, having trained thereoverendless sprocket chains 21, the same being also trained over sprocketwheels 22 loosely journaled or mounted upon the operating shaft 13, thesaid sprocket wheels 22 being held against displacement longitudinallyupon the operating shaft 13 in any desirable manner, and on the lockingof the sprocket wheels 22 upon the operating shaft motion therefrom maybe transferred to the stud shafts 19 for rotating the samesimultaneously therewith.

Splined or otherwise keyed to the operating shaft 13 for slidingmovement longitudinally thereon are clutch members 23, which are adaptedfor positive engagement with clutch surfaces 24, formed on the ends inthe side rails 7 of the bed, and is formed,

with a handle 26 to permit the manual manipulation thereof, for throwingthe clutches in engagement with and disengaging the same from thesprocket wheels 22 when desired.

Detachably engaged with one end of the operating shaft 13 is a crank 27,whereby.

the said shaft may be readily turned as the occasion requires.

Depending from the section 9 and connected thereto by means of fasteners28 are double rack bars 29, the teeth 30 forming the racks at one sideof the bars being in mesh with rack pinion 31 fixed to the stud shafts19, so that when the latter are rotated in one direction the section 9will be raised to the desired elevation above the side rails 7 of thebed and on reversing the direction of rotation of the stud shafts, thesaid section 9 will be lowered on to the side rails of the bed. When therack bars 29 have been raised the same may be sustained in theiradjusted position by means of locking dogs 32, which are pivoted to theside rails of the bed at 33, and engage the rack teeth 34 on said bars.

Depending from the sections 8 and 10 are pairs of arcuate-shaped rackbars 35 and 36 respectively, the same being connected to the saidsection by means of pivots 37 the rack teeth 38 of the bar 35 beingdesigned to mesh with pinions 39 fixed to the countershaft 14, while therack teeth 40 on one pair of the bars 36 engage or mesh with pinions 40fixed to the shaft 13 and the rack teeth 40 on the other pair of bars 36are engaged by means of locking dogs 41, the same being fixed to a shaft42 journaled in the side rails 7 of the bed. Formed on the rack bars 36having teeth 40 are guide loops 43, in which is engaged the crank 44 ofa turning shaft 45, the same being formed with .a handle 46 whichpermits the turning of the shaft 45 so that the said rack bars 36 may bebrought into or out of engagement with the pinions 40 as will be clearlyapparent.

The rack bars 35 and also the rack teeth 40 on the rack bars 36 are heldin positive engagement with the pinion 39 and dogs 41 respectively bymeans of lift springs 46 which are suitably connected to the bed andwork against the said rack bars.

It will be noted that by the employment of the clutch members 23 thecounter-shaft 14 can be independently operated with respect to the studshafts 19 on the throwing in of the clutch members 23 with the clutchsurfaces 24 of the sprocket Wheels 22, the.

stud shafts 19 being simultaneously rotated with the counter-shaft 14whereby the sections 8 and 9 will be raised or adjusted together.

Fixed to the side rails of the bed directly beneath the section 9 is asupport such as a shelf 47 which is designed as a restfor a receptaclewhen the said section 9 has been raised to a position for convenient useby the patient.

From the foregoing description, taken in connection with theaccompanying drawings, it is thought that the construction and operationof the invention will be clearly understood, and therefore, a moreextended explanation has been omitted.

hat is claimed is 1. In a bedstead, a mattress frame comprising aplurality of sections adapted to normally rest upon the side rails ofthe bedstead, hinges connecting a pair of said sections, racks connectedto the sections, means engaging a series of the racks for raising a pairof the sections, means having connection with said first named meansforcontrolling the same, and means for locking the remaining rack inadjusted position.

2. In a bedstead, a mattress frame comprising a plurality of sectionsadapted to normally rest upon the side walls of the bedstead, hingesconnecting a pair of said sections, racks connected to the sections,means engaging a series of the racks for raising a pair of the sections,means having connection with said first named means for controlling thesame, means for locking the remaining rack in adjusted position, and arest connected with the side rails of the bedstead and lying beneath oneof said sections. v

3. In a bedstead, a mattress frame comprising a plurality of sectionsadapted to normally rest upon the side walls of the bedstead, hingesconnecting a pair of said sections, racks connected to the sections,means engaging a series of the racks for raising a pair of the sections,means having connection with said first named means for controlling thesame, means for locking the remaining rack in adjusted position, a restconnected with the side rails of the bedstead, and clutch meanscontrolling the connections between the driving means and one of thedriven means.

4. In a bedstead, a mattress frame com prising a plurality of sectionsadapted to normally rest upon the side walls of the bedstead, hingesconnecting a pair of said sections, racks connected to. the sections,means engaging a series of the racks for raising a pair of the sections,means having connection with said first named means for controlling thesame, means for locking the remaining rack in adjusted position, a restconnected with the side rails of the bedstead and lying beneath one ofsaid sections, clutch means controlling the connections between thedriving means and one of the driven means, and manually operable meansfor actuating the clutch means.

5. In a bedstead, a mattress frame comprising a plurality of sectionsadapted to normally rest upon the side walls of the bedstead, hingesconnecting a pair of said sections, racks connected to the sections,means engaging a series of the racks for raising a pair of the sections,means having connection with said first named means for controlling thesame, means for locking the remaining rack in adjusted position, a restconnected with the side rails of the bedstead and lying beneath one ofsaid sections, clutch means controlling the connections between thedriving means and one of the driven means, manually operable means foractuating the clutch means, and means acting upon one pair of racks tomove same into and out of engagement with the driven means.

In testimony whereof I aiiix my signature in presence of two witnesses.

, HENRY M. TERRY.

Witnesses ANDREW R. Bmcn,

KATHRYN CHRISMAN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. C.

